substrate of the cytochrome P450 (CYP) isoform CYP2C19
Sample solution is provided at 25 µL, 10mM.
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|Cas No.||70989-04-7||SDF||Download SDF|
|Canonical SMILES||O=C1[[email protected]@](C2=CC=CC=C2)(CC)NC(N1C)=O|
|Solubility||≤15mg/ml in ethanol;25mg/ml in DMSO;25mg/ml in dimethyl formamide||Storage||Store at -20°C|
|Physical Appearance||A crystalline solid||Shipping Condition||Evaluation sample solution : ship with blue ice.All other available size: ship with RT , or blue ice upon request|
|General tips||For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.|
(S)-Mephenytoin is an anticonvulsive drug which is metabolized by N-demethylation and 4-hydroxylation (of the aromatic ring). (S)-Mephenytoin is a substrate of the cytochrome P450 (CYP) isoform CYP2C19, also known as mephenytoin 4-hydroxylase .
CYP2C19 is the main mephenytoin 4-hydroxylase in humans implicated in metabolizing a variety of therapeutic agents, such as omeprazole, proguanil, diazepam, propranolol, citalopram, imipramine, and certain barbiturates .
In vitro: In the presence of cytochrome b5, the Km value for S-mephenytoin was 1.25 mM with all five purified cytochrome P-450s preparations, and Vmax values were 0.8-1.25 nmol of 4-hydroxy product formed per min/nmol of P-450 .
 Shimada T, Misono K S, Guengerich F P. Human liver microsomal cytochrome P-450 mephenytoin 4-hydroxylase, a prototype of genetic polymorphism in oxidative drug metabolism. Purification and characterization of two similar forms involved in the reaction[J]. Journal of Biological Chemistry, 1986, 261(2): 909-921.
 Ferguson R J, De Morais S M F, Benhamou S, et al. A new genetic defect in human CYP2C19: mutation of the initiation codon is responsible for poor metabolism of S-mephenytoin[J]. Journal of Pharmacology and Experimental Therapeutics, 1998, 284(1): 356-361.